CUET UG Mathematics Applied Increasing Decreasing Function Previous Year Question Paper and Solution with PDF

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Qus : 1 CUET UG Mathematics Applied PYQ

If a function $f(x)=x^{2}+bx+1$ is increasing in the interval $[1,2]$, then the least value of $b$ is:

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4
Go to Discussion

Qus : 2 CUET UG Mathematics Applied PYQ

The function $f(x)=x^2-2x$ is strictly decreasing in the interval

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Go to Discussion

$f(x)=x^2-2x$

Differentiate:

$f'(x)=2x-2$

For strictly decreasing,

$f'(x)<0$

$2x-2<0$

$2x<2$

$x<1$

So function is strictly decreasing in

$(-\infty,1)$

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